HP Integrity Virtual Machines Installation, Configuration, and Administration

valid supported configurations before being used for Integrity VM storage resources (see
Section 7.2.1.3: “VM Storage Multipath Solutions” (page 77)).
The resource statements in the following subsections do not contain VM hardware addressing.
The PCI bus, PCI slot, and SCSI target numbers are optional.
7.2.2.3.1 Virtual Disks
A Virtual Disk is an emulated SCSI disk whose virtual media comes from a VM Host disk LUN.
The VM Host disk LUN is specified using a character device file. The character device file is
owned by the HP-UX sdisk driver.
Virtual Disk resources cannot be shared simultaneously across active virtual machines (except
in certain cluster configurations, as indicated in this manual). Only one active virtual machine
at time can be given a particular Virtual Disk resource. Virtual Disk resources can be changed
dynamically among active virtual machines.
To prevent virtual media conflicts that can result in data corruption, a proper accounting of how
the VM Host whole disks are allocated for use by Virtual Disks needs to be done, as described
in Section 7.2.1.4: “VM Storage Management” (page 78).
To provide a multipath solution for a Virtual Disk, see Section 7.2.1.3: “VM Storage Multipath
Solutions” (page 77).
If you are using a multipath product, the Virtual Disk resource statement takes the form of:
disk:scsi::disk:/dev/rdsk/cXtYdZ
Where /dev/rdsk/cXtYdZ is an HP-UX character sdisk device file.
These device files can be located for a VM Host LUN using the ioscan command. These system
files are installed and removed using the insf and rmsf commands, respectively. Device files
are created automatically by the VM Host for any storage it sees during boot. New devices
connected or created after boot time, require the use of ioscan and insf to create the new
sdisk device files. Old device files for storage not longer present can be removed with rmsf.
For example:
# ioscan
# ioscan -funC disk
disk 110 0/5/1/0.11.16.0.0.0.2 sdisk CLAIMED DEVICE HP A6188A
disk 116 0/5/1/0.11.16.0.0.0.3 sdisk CLAIMED DEVICE HP A6188A
/dev/dsk/c19t0d3 /dev/rdsk/c19t0d3
# insf -H 0/5/1/0.11.16.0.0.0.2
# ioscan -funC disk
disk 110 0/5/1/0.11.16.0.0.0.2 sdisk CLAIMED DEVICE HP A6188A
/dev/dsk/c19t0d2 /dev/rdsk/c19t0d2
disk 116 0/5/1/0.11.16.0.0.0.3 sdisk CLAIMED DEVICE HP A6188A
/dev/dsk/c19t0d3 /dev/rdsk/c19t0d3
In this example, the Virtual Disk Resource Statement is
disk:scsi::disk:/dev/rdsk/c19t0d2.
If you are using HP Securepath/Autopath for Virtual Disks, you can use either sdisk device
files or virtual device special files (VDSFs). Both device paths provide high availability for the
virtual machine and can be used interchangeably. For information about enabling these device
paths, see the HP Securepath/Autopath documentation.
If you are using EMC PowerPath for a Virtual Disk, make sure that the sdisk device files that
you use for Virtual Disks are enabled for use by the multipath product. Consult the multipath
vendor's documentation for more information.
7.2 Configuring Integrity VM Storage 83